.video {
    width: 100%;
    height: 4.5rem;
}
.video-title {
    padding: 0.3rem 0 0.3rem 0.2rem;
    box-sizing: border-box;
    border-bottom: 0.13rem solid #F2F2F2;
}
.video-title .title {
    font-size: 0.3rem;
    color: #1A1A1A;
    margin-bottom: 10px;
}
.video-title .count {
    font-size: 0.24rem;
    color: #686868;
}
.list-item {
    width: 100%;
    overflow-x: auto;
    flex-basis: 2.6rem;
    /* flex-shrink: 0; */
    white-space: nowrap;
    justify-content: space-between;
}
::-webkit-scrollbar {
    display: none;
}
.video-list .link {
    width: 0.12rem;
    height: 0.22rem;
}
.list-title {
    padding: 0.34rem 0.2rem 0.3rem;
    box-sizing: border-box;
}
.list-sub-title {
    color: #686868;
}
.item {
    font-size: 10px;
    width: 2.6rem;
    line-height: 0.36rem;
    margin:0 10px;
}
.overhidden-word {
    overflow: hidden;
}
.kc-item {
    width: 100%;
    height: 1.42rem;
}
/* 课程内容 */
.content-navs {
    margin-top: 0.3rem;
}
.nav {
    background: #D9D7D7;
    height: 0.64rem;
    line-height: 0.64rem;
    color: #1A1A1A;
    font-size: 0.3rem;
    text-align: center;
}
.nav.active {
    background: #1D84E6;
}
/* 内容 */
.content {
    padding: 0.3rem;
    box-sizing: border-box;
}
.content-title {
    color: #010101;
    font-size: 14px;
    margin-bottom: 0.3rem;
}
.content-body {
    font-size: 12px;
    color: #4D4D4D;
}
#question {
    width: 100%;
    height: 60px;
    border: none;
    padding: 10px;
    resize: none;
    box-sizing: border-box;
    outline: none;
}
.email-input {
    padding: 0 0 0 10px;
    box-sizing: border-box;
    background: #1D84E6;
    line-height: 30px;
    color: #fff;
    justify-content: space-between;
}
#email {
    flex: 1;
    padding-left: 10px;
    box-sizing: border-box;
    outline: none;
    background: #1D84E6;
    border: none;
    color: #fff;
}
input::-webkit-input-placeholder{
    color:#fff;;
}
input::-moz-placeholder{   /* Mozilla Firefox 19+ */
    color:#fff;;
}
input:-moz-placeholder{    /* Mozilla Firefox 4 to 18 */
    color:#fff;;
}
input:-ms-input-placeholder{  /* Internet Explorer 10-11 */ 
    color:#fff;;
}
#answer {
    width: 50px;
}